JP2011202680A - Shift and select shaft assembly of transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and easily fix a shift guide plate to a shift and select (S&S) shaft, while securing high positional accuracy in a select direction and in a shift direction, in an S&S shaft assembly.SOLUTION: The shift guide plate 50 is provided with a first knock hole 52 radially penetrating thereto, at a location with no projection 51. A groove 53 extending in the select direction is formed to the inner face of the shift guide plate 50. On an outer face of a sleeve 22 fitted and fixed to a side face of a shaft body of the S&S shaft, a protrusion 23 extending in the select direction and a second knock hole 24 radially penetrating thereto are formed. Widths of the protrusion 23 and the groove 53 are gradually increased toward the radially outside. Only fitting the groove 53 to the projection 23 and inserting the knock pin 60 into the first and second knock holes 52, 24, mounting and fixing of the shift guide plate 50 to the sleeve 22 (that is, the S&S shaft) are completed.

Description

  The present invention relates to a shift and select shaft assembly that is assembled and fixed to a case of a transmission for a vehicle. Hereinafter, the “shift and select shaft” may be referred to as “S & S shaft”.

  2. Description of the Related Art Conventionally, an S & S shaft assembly that is assembled and fixed to a case of a manual transmission for a vehicle is widely known (for example, see Patent Document 1). As an example of such an S & S shaft assembly, the present applicant has conventionally manufactured an S & S shaft assembly shown in FIG.

  The S & S shaft assembly shown in FIG. 26 includes a fixing member 110 that is fixed to a transmission case, an S & S shaft 120, and a shift guide plate 130. Hereinafter, a vehicle in which the shift lever is operated in a pattern shown in FIG. 4 to be described later, that is, a vehicle having six shift stages for forward movement and one shift stage for backward movement is assumed. In the pattern shown in FIG. 4, the position of the point o is referred to as a “neutral position”. The positions of the points a, b, c, d, e, f, and g are respectively set to “first speed shift position”, “second speed shift position”, “third speed shift position”, “fourth speed shift position”, and “fifth speed”. These are called “shift position”, “6-speed shift position”, and “reverse shift position”. The positions of the points h, i, and j are referred to as “LOW select position”, “HIGH select position”, and “reverse select position”, respectively. In FIG. 4, the shift lever is in the neutral position. Hereinafter, in the shift pattern as shown in FIG. 4, the horizontal operation of the shift lever is referred to as “select operation”, and the vertical operation of the shift lever is referred to as “shift operation”.

  The S & S shaft 120 is moved in the axial direction with respect to the fixed member 110 by a driving force received from a power transmission member (not shown) connected to the protrusion 111 in response to a selection operation of the shift lever. It is supported by the fixing member 110. Further, the S & S shaft 120 rotates around the axis with respect to the fixed member 110 by a driving force received from a power transmission member (not shown) connected to the protrusion 112 according to a shift operation of the shift lever. Thus, it is supported by the fixing member 110. The S & S shaft 120 is fixedly provided with an inner lever 121 (two in this example) that protrudes radially outward.

  The shift guide plate 130 is fixed to the side surface of the S & S shaft 120. A plurality of projecting portions 131 projecting radially outward are formed on the outer surface of the shift guide plate 130. As will be described later, the side surfaces of the plurality of protrusions 131 engage with guide pins fixed to members fixed in the case of the transmission. As shown in FIG. 27, the shift guide plate 130 is fixed to the side surface of the S & S shaft 120 using a pair of knock pins 140, 140 and a pair of bolts 150, 150. Hereinafter, the “axial direction” is sometimes referred to as “select direction”, and the “direction perpendicular to the axial direction” is sometimes referred to as “shift direction”.

  As described above, according to the selection operation or the shift operation of the shift lever, each inner lever 121 and the shift guide plate 130 are integrally moved in the selection direction or the shift direction with respect to the fixing member 110.

  The S & S shaft assembly described above is assembled and fixed to the case of the manual transmission. When the manual transmission has been assembled, a plurality of shift heads (hereinafter referred to as “heads”) arranged along the select direction can be engaged with the inner lever 121 in the shift direction. Then, one head to be engaged with the inner lever 121 is selected by the selection operation of the shift lever.

  Hereinafter, “selection” for a certain head refers to a state in which the head is to be engaged with the inner lever 121. Then, in response to the shift operation of the shift lever, the inner lever 121 pushes the selected head in the shift direction, so that the head moves in the shift direction from the neutral position, and the corresponding gear stage is achieved. .

  As shown in FIG. 28, when the manual transmission is assembled, the position of the guide pin relative to the shift guide plate 130 moves in the select direction or the shift direction in accordance with the select operation or shift operation of the shift lever. Points a to j in FIG. 28 correspond to points a to j shown in FIG. For example, when the shift lever is at the 3rd speed shift position (3rd speed shift completion state), the position of the guide pin with respect to the shift guide plate 130 is the position of point c in FIG.

  As shown in FIG. 28, the side surfaces of the “corresponding protrusions 131” are engaged with the guide pins at positions adjacent to the guide pins in the select direction in the shift completion state of each gear. It arrange | positions at the shift guide plate 130 so that it may be possible. As a result, the shift guide plate 130 (a plurality of protrusions 131 thereof) achieves the function of restricting the movement of the S & S shaft 120 in the select direction in the shift completion state of each gear stage. As a result, the shift lever is restricted from being moved by the select operation in a state where the shift lever is at the shift position of each gear position, and the operation feeling of the shift lever is improved. Hereinafter, this function by the shift guide plate 130 is referred to as a “select operation restriction function”.

  In order to reliably achieve the select operation restricting function, high positional accuracy in the select direction and the shift direction (especially the select direction) is required for mounting and fixing the shift guide plate 130 (a plurality of protrusions 131 thereof) to the S & S shaft 120. Required. Therefore, as shown in FIG. 27 described above, the shift guide plate 130 is accurately positioned in the select direction and the shift direction (especially the select direction) with respect to the side surface of the S & S shaft 120 using the pair of pins 140 and 140. The pair of bolts 150 and 150 are used to securely fix the side surface of the S & S shaft 120.

  However, in the above-described configuration, a relatively large number of parts are used for mounting and fixing the shift guide plate to the S & S shaft. Therefore, the manufacturing cost increases due to the increase in the number of parts. In addition, the man-hours for fixing the shift guide plate to the S & S shaft are relatively large.

JP 2009-121656 A

  In view of the above, an object of the present invention is to simplify the S & S shaft assembly including a shift guide plate that achieves a select operation restriction function while ensuring high positional accuracy in the select direction and the shift direction (particularly the select direction). And it is providing the thing which can fix a shift guide plate to an S & S shaft easily.

  An S & S shaft assembly according to the present invention includes a fixing member fixed to a case (housing) of a transmission, an S & S shaft, and a shift guide plate. The S & S shaft is arranged so as to move in the axial direction (select direction) with respect to the fixed member in response to a select operation and to rotate about the axis with respect to the fixed member in response to a shift operation. An inner lever that projects radially outward is fixed to the S & S shaft.

  The shift guide plate is fixed to the side surface of the S & S shaft. A plurality of projecting portions projecting radially outward are formed on the outer surface of the shift guide plate. The side surfaces of the plurality of protrusions engage with guide pins fixed to members fixed in the case in the axial direction (select direction).

  In this S & S shaft assembly, one shift head that engages with the inner lever can be selected from among a plurality of shift heads arranged in parallel along the axial direction (select direction) in accordance with the select operation. In response to the shift operation, the inner lever pushes the selected one shift head (a recess thereof) in a shift direction perpendicular to the axial direction, so that the shift head moves along the shift direction, Corresponding gears are achieved.

  When the S & S shaft is in a position corresponding to “the state where each gear of the transmission has been achieved” (that is, the shift completion state of each gear), the plurality of protrusions are located with respect to the guide pin. Thus, the side surface of the “corresponding protrusion” can be engaged with the guide pin at a position adjacent in the axial direction so as to be disposed on the shift guide plate. Thereby, the function (select operation regulation function) which regulates the movement of the S & S shaft in the axial direction can be achieved.

  The characteristics of this S & S shaft assembly are as follows. That is, the shift guide plate is formed with a first knock hole penetrating in the radial direction (thickness direction). A groove extending in the axial direction is formed on the inner side surface of the shift guide plate. The groove extends toward the outer side in the radial direction and is wider toward the outer side in the radial direction. Also, a second knock hole along the radial direction and a projection extending in the axial direction that protrudes outward in the radial direction and is wider toward the radially outer side are formed on the side surface of the S & S shaft. . The shift guide plate is fixed to the side surface of the S & S shaft by fitting the groove into the protrusion and passing a knock pin through the first and second knock holes.

  According to the above configuration, the mounting and fixing of the shift guide plate to the S & S shaft is completed only by fitting the groove of the shift guide plate to the protrusion of the S & S shaft and passing the knock pin through the first and second knock holes. In addition, when the shift guide plate is attached and fixed, high positional accuracy can be ensured by passing the knock pin through the first and second knock holes in the select direction. With respect to the shift direction, high positional accuracy can be obtained by “contact between the side surface of the protrusion and the side surface of the groove” obtained by fitting the groove of the shift guide plate to the protrusion of the S & S shaft.

  On the other hand, high positional accuracy cannot be obtained in the radial direction. However, there is no problem because high radial position accuracy is not required to achieve the select operation restriction function. In addition, both the protrusion and the groove are wider toward the outer side in the radial direction. Accordingly, the fitting of the projection and the groove can prevent the shift guide plate from falling off the S & S shaft without using a member for preventing the drop such as a bolt. As described above, the shift guide plate can be fixed to the S & S shaft easily and easily while ensuring high positional accuracy in the select direction and the shift direction (particularly the select direction).

  Here, the inner lever, the second knock hole, and the protrusion may be directly formed on the S & S shaft main body. The S & S shaft includes a shaft main body and a sleeve fitted and fixed to a side surface of the shaft main body, and the inner lever, the second knock hole, and the protrusion are formed on the sleeve. May be.

It is the front view which showed the S & S shaft assembly which concerns on embodiment of this invention. It is the left view which showed the S & S shaft assembly which concerns on embodiment of this invention. It is the right view which showed the S & S shaft assembly which concerns on embodiment of this invention. It is the figure which showed an example of the shift pattern of a shift lever. FIG. 4 is a diagram for explaining a procedure for attaching a shift guide plate to a sleeve in the S & S shaft assembly shown in FIGS. 1 to 3. It is a perspective view which shows the state which the attachment shown in FIG. 5 was completed. FIG. 4 is a schematic diagram showing a positional relationship among an inner lever, a shift head, and an interlock plate in a neutral state in an assembled state of a manual transmission in which the S & S shaft assembly shown in FIGS. 1 to 3 is assembled. In the S & S shaft assembly shown in FIGS. 1-3, it is a figure for demonstrating the relationship between the position with respect to the shift guide plate of a guide pin, and the position of a shift lever. It is a figure which shows the position with respect to the shift guide plate of the guide pin in a neutral state. It is a schematic diagram corresponding to FIG. 7 about a 4th speed shift state. FIG. 10 is a diagram corresponding to FIG. 9 for a 4-speed shift state. It is a schematic diagram corresponding to FIG. 7 about the 3rd speed shift state. FIG. 10 is a diagram corresponding to FIG. 9 for the third speed shift state. It is a schematic diagram corresponding to FIG. 7 about a 2nd speed shift state. FIG. 10 is a diagram corresponding to FIG. 9 for the second speed shift state. It is a schematic diagram corresponding to FIG. 7 about the 1st-speed shift state. It is a figure corresponding to Drawing 9 about the 1st speed shift state. It is a schematic diagram corresponding to FIG. 7 about a 6-speed shift state. FIG. 10 is a diagram corresponding to FIG. 9 for a 6-speed shift state. FIG. 8 is a schematic diagram corresponding to FIG. 7 for a fifth speed shift state. FIG. 10 is a diagram corresponding to FIG. 9 for the fifth speed shift state. It is a schematic diagram corresponding to FIG. 7 about a reverse shift state. FIG. 10 is a diagram corresponding to FIG. 9 for a reverse shift state. It is a figure for demonstrating the positional accuracy regarding a selection direction in the case of attachment and fixation of a shift guide plate. It is a figure for demonstrating the positional accuracy regarding a shift direction and a radial direction in the case of attachment and fixation of a shift guide plate. It is the perspective view which showed the conventional S & S shaft assembly. FIG. 27 is a diagram for explaining a procedure when a shift guide plate is attached to the S & S shaft in the S & S shaft assembly shown in FIG. 26. FIG. 27 is a diagram for explaining the relationship between the position of the guide pin relative to the shift guide plate and the position of the shift lever in the S & S shaft assembly shown in FIG. 26.

  Hereinafter, an S & S shaft assembly according to an embodiment of the present invention and a manual transmission to which the S & S shaft assembly is assembled will be described with reference to the drawings.

(Constitution)
As shown in FIGS. 1 to 3, an S & S shaft assembly A according to an embodiment of the present invention includes a fixing member 10 fixed to a case (a housing, not shown) of a manual transmission, an S & S shaft 20, Lock plates 30A and 30B, a plate 40, and a shift guide plate 50 are provided. 1 to 3, the portion indicated by fine thin dots corresponds to the interlock plates 30A and 30B, and the portion indicated by fine dark dots corresponds to the plate 40 (in other drawings as well). The same).

  This embodiment is applied to a vehicle in which the shift lever is operated in the pattern shown in FIG. 4, that is, a vehicle having six shift stages for forward movement and one shift stage for backward movement. Also in this embodiment, various names for the pattern shown in FIG. 4 described in the background art section are applied.

  1 to 3 again, the fixing member 10 is fixed to a case of a manual transmission (not shown) using one of well-known fastening means such as bolts and nuts.

  The S & S shaft 20 is connected to a shift lever-side link mechanism via respective power transmission members (wires or the like) connected to the protrusions 11 and 12. The S & S shaft 20 is supported by the fixing member 10 so as to move in the axial direction with respect to the fixing member 10 by the driving force received from the power transmission member connected to the protrusion 11 in response to the selection operation of the shift lever. ing. Further, the S & S shaft 20 is fixed to the fixing member 10 so as to rotate about the axis with respect to the fixing member 10 by a driving force received from the power transmission member connected to the protrusion 12 in accordance with the shift operation of the shift lever. It is supported by. This support mode may be any mode as long as the S & S shaft 20 can move in the axial direction with respect to the fixed member 10 and can rotate around the axis.

  The S & S shaft 20 is fixedly provided with two inner levers 21A and 21B protruding outward in the radial direction. The direction in which the inner levers 21A and 21B protrude with respect to the S & S shaft 20 is the same. The inner levers 21A and 21B may be fixed to the S & S shaft 20 by assembling a “member different from the S & S shaft main body” formed with the inner lever to the S & S shaft main body, or one member is cut out. For example, the S & S shaft 20 may be formed by processing.

  The interlock plates 30A and 30B move in the axial direction with respect to the fixed member 10 along with the axial movement of the S & S shaft 20, and cannot rotate about the axis with respect to the fixed member 10 and the S & S shaft. 20 are individually supported. The interlock plate 30A (30B) includes a support portion 31A (31B), an engagement portion 32A (32B), and a restriction portion 33A (33B).

  The support portion 31 </ b> A (31 </ b> B) is supported by the S & S shaft 20 such that the support portion 31 </ b> A (31 </ b> B) can rotate relative to the S & S shaft 20 around the axis and cannot move in the axial direction. Thus, the support portion 31A (31B) achieves a function of restricting (prohibiting) the relative movement of the interlock plate 30A (30B) in the axial direction with respect to the S & S shaft 20.

  The engaging portion 32A (32B) is fixed to the support portion 31A (31B). A groove parallel to the axial direction is formed in the engaging portion 32A (32B). A plate 40 is fitted in each groove. The upper end (end in the positive direction of the Z axis) of the plate 40 is fixed to the fixing member 10 by one of well-known fixing methods (for example, press-fitting) so that the plate 40 is along the axial direction. Thereby, the engaging portions 32A (32B) (and the plate 40) achieve a function of restricting (inhibiting) the rotation of the interlock plate 30A (30B) around the axis with respect to the fixing member 10.

  The restriction portion 33A (33B) is fixed to the support portion 31A (31B). The restricting portion 33A (33B) has a flat plate shape extending along the axial direction. The restricting portion 33A (33B) is formed with a slit 34A (34B) extending in a direction perpendicular to the axial direction. The slit 34A (34B) divides the restricting portion 33A (33B) in the axial direction.

  Each inner lever 21A (21B) protrudes from the slit 34A (34B) through the inside of the slit 34A (34B) so as to be movable in a direction perpendicular to the axial direction. That is, the restricting portion 33A (33B) extends in the axial direction at each position adjacent to both sides in the axial direction with respect to the inner lever 21A (21B). Hereinafter, the “axial direction” is sometimes referred to as “select direction”, and the “direction perpendicular to the axial direction” is sometimes referred to as “shift direction”.

  The shift guide plate 50 is fixed to the side surface of the S & S shaft 20. A plurality of (six in this example) projecting portions 51 projecting radially outward are formed on the outer surface of the shift guide plate 50. As will be described later, the side surfaces of the plurality of projecting portions 51 engage with guide pins fixed to members fixed in the case of the manual transmission in the select direction.

  The shift guide plate 50 may be attached to “a member different from the S & S shaft main body” assembled to the shaft main body, or may be directly attached to the shaft main body. Hereinafter, an example in which the shift guide plate 50 is attached to the sleeve 22 to which the inner lever 21A is fixed will be described with reference to FIGS.

  As shown in FIGS. 5 and 6, the shift guide plate 50 is formed with a first knock hole 52 penetrating in the radial direction (plate thickness direction) at a position where the plurality of protrusions 51 do not exist. . Further, a groove 53 extending (penetrating) in the select direction is formed on the inner side surface of the shift guide plate 50. The groove 53 is recessed outward in the radial direction (from the inner surface toward the outer surface), and the width (in the shift direction) of the groove 53 is wider toward the outer side in the radial direction.

  On the other hand, a projection 23 extending in the select direction and a second knock hole 24 penetrating in the radial direction are formed on the outer surface of the cylindrical sleeve 22. The protrusion 23 protrudes outward in the radial direction, and the width of the protrusion 23 (in the shift direction) is wider toward the outer side in the radial direction.

  As shown in FIG. 5, the groove 53 of the shift guide plate 50 is fitted into the protrusion 23 of the sleeve 22. Thereafter, the knock pin 60 is passed through the first and second knock holes 52 and 24. Thereby, as shown in FIG. 6, the attachment of the shift guide plate 50 to the sleeve 22 is completed. The sleeve 22 to which the shift guide plate 50 is attached is fitted and fixed to the side surface of the shaft body by spline fitting or the like. Thereby, in the S & S shaft 20, the shaft main body, the inner lever 21A, and the shift guide plate 50 are integrated. In the example shown in FIGS. 1 to 3, the inner lever 21B is also fixed to a sleeve that is fitted and fixed to the shaft body, like the inner lever 21A.

  As described above, the inner levers 21 </ b> A and 21 </ b> B and the shift guide plate 50 are integrally moved in the selection direction or the shift direction with respect to the fixing member 10 in accordance with the selection operation or the shift operation of the shift lever. On the other hand, the interlock plate 30A (30B) moves in the select direction with respect to the fixing member 10 in response to the select operation of the shift lever, but does not move in the shift direction even if the shift lever is operated to shift.

(Operation)
The S & S shaft assembly A described above is assembled and fixed to the case of the manual transmission. In a state where the manual transmission is assembled, shift heads (hereinafter referred to as “heads”) 81 to 84 fixed to the fork shafts 71 to 74 are arranged along the select direction, as schematically shown in FIG. Are arranged in parallel (four in this example). The heads 81 to 84 are a 3rd to 4th shift head, a 1st to 2nd shift head, a 5th to 6th shift head, and a reverse head, respectively. For each head (each fork shaft), the position shown in FIG. 7 is referred to as a “neutral position”. The state shown in FIG. 7 corresponds to the state in which the shift lever is in the neutral position.

  In a state where all of the heads 81 to 84 are in the neutral position (the state shown in FIG. 7), the manual transmission is in the neutral state. When the head 81 (fork shaft 71) moves from the neutral position to the shift completion position in the left (right) direction in the drawing in the neutral state, the manual transmission is in the 4-speed (3-speed) shift state. When the head 82 (fork shaft 72) moves from the neutral position to the shift completion position in the left (right) direction in the drawing in the neutral state, the manual transmission enters the second speed (first speed) shift state. When the head 83 (fork shaft 73) moves from the neutral position to the shift completion position in the left (right) direction in the drawing in the neutral state, the manual transmission is in a 6-speed (5-speed) shift state. When the head 84 (fork shaft 74) moves from the neutral position to the shift completion position in the left direction in the drawing in the neutral state, the manual transmission is in the reverse shift state.

  As each fork shaft moves, the corresponding sleeve for shifting gears moves via a shift fork (not shown). As a result, a power transmission path including a gear train of the corresponding gear is formed, and the corresponding gear is achieved. As such a configuration, one of well-known ones is used.

  Recesses are formed in the heads 81 to 84, respectively. The concave portions of the heads 81 and 82 engage with the inner lever 21A or the interlock plate 30A (specifically, the restriction portion 33A) in the shift direction. The concave portions of the heads 83 and 84 engage with the inner lever 21B or the interlock plate 30B (specifically, the restriction portion 33B) in the shift direction.

  By selecting the shift lever, the head to be engaged with one of the inner levers 21A and 21B is selected. Hereinafter, “selection” for a certain head refers to a state in which the head is to be engaged with the inner lever. Then, according to the shift operation of the shift lever, one of the inner levers 21A and 21B pushes one selected head in the shift direction, so that the head moves from the neutral position to the shift completion position, and the corresponding shift A stage is achieved.

  Further, as shown in FIG. 8, when the manual transmission is assembled, the guide pin fixed to the member fixed in the case of the manual transmission has the axis of the guide pin perpendicular to the axis of the S & S shaft 20. The guide pins are arranged in the vicinity of the radially outer side of the outer side surface so that they intersect and the front end of the guide pin faces the outer side surface of the shift guide plate 50. As a result, according to the position of the shift guide plate 50 with respect to the guide pin, the side surface of the guide pin is engaged with any one of the plurality of protrusions 51 of the shift guide plate 50.

  As shown in FIG. 8, the position of the guide pin with respect to the shift guide plate 50 moves in the select direction or the shift direction in accordance with the select operation or shift operation of the shift lever. Points aj in FIG. 8 correspond to points aj shown in FIG. For example, when the shift lever is at the fourth speed shift position (fourth speed shift completion state), the position of the guide pin with respect to the shift guide plate 50 is the position of point d in FIG. Hereinafter, each shift stage will be described more specifically.

  When the shift lever is in the neutral position, the inner lever 21A is engaged with one head 81 as shown in FIG. That is, one head 81 is selected by the inner lever 21A. In this state, the manual transmission is in a neutral state. Further, in this state, as shown in FIG. 9, the position of the guide pin with respect to the shift guide plate 50 is the position of point o in FIG.

  When the shift lever is operated from the neutral position to the 4-speed shift position, as shown in FIG. 10, the inner lever 21A pushes the concave portion of the head 81 in the shift direction (left direction in the figure), thereby causing the head 81 (accordingly, The fork shaft 71) moves from the neutral position to the shift completion position along the shift direction (left direction in the figure). As a result, the manual transmission is in the 4-speed shift state. In this state, as shown in FIG. 11, the position of the guide pin with respect to the shift guide plate 50 is the position of the point d in FIG.

  Similarly, when the shift lever is operated from the neutral position to the third speed shift position, as shown in FIG. 12, the head 81 (and therefore the fork shaft 71) moves from the neutral position along the shift direction (right direction in the figure). Move to the shift completion position. As a result, the manual transmission enters the third speed shift state. In this state, as shown in FIG. 13, the position of the guide pin with respect to the shift guide plate 50 is the position of point c in FIG.

  In practice, the shift guide plate 50 rotates about the axis of the S & S shaft 20 according to the shift operation of the shift lever. However, for convenience of explanation, in FIGS. 11 and 13, according to the shift operation of the shift lever. The shift guide plate 50 is described so as to translate with respect to the guide pin (the same applies to FIGS. 15, 17, 19, 21, and 23 described later).

  Next, the case where the shift lever is at the LOW select position will be described. In this case, one head 82 is selected by the inner lever 21A. When the shift lever is operated from the LOW select position to the 2nd speed shift position, as shown in FIG. 14, the head 82 (and therefore the fork shaft 72) is shifted from the neutral position along the shift direction (left direction in the figure). Move to position. As a result, the manual transmission is in the 2-speed shift state. In this state, as shown in FIG. 15, the position of the guide pin with respect to the shift guide plate 50 is the position of point b in FIG.

  Similarly, when the shift lever is operated from the LOW select position to the first speed shift position, as shown in FIG. 16, the head 82 (and therefore the fork shaft 72) moves from the neutral position along the shift direction (right direction in the figure). To move to the shift completion position. As a result, the manual transmission is in the first speed shift state. In this state, as shown in FIG. 17, the position of the guide pin with respect to the shift guide plate 50 is the position of point a in FIG.

  Next, the case where the shift lever is in the HIGH select position will be described. In this case, one head 83 is selected by the inner lever 21B. When the shift lever is operated from the HIGH select position to the 6th speed shift position, as shown in FIG. 18, the head 83 (and hence the fork shaft 73) is shifted from the neutral position along the shift direction (left direction in the figure). Move to position. As a result, the manual transmission is in a 6-speed shift state. In this state, as shown in FIG. 19, the position of the guide pin with respect to the shift guide plate 50 is the position of the point f in FIG.

  Similarly, when the shift lever is operated from the HIGH select position to the fifth speed shift position, as shown in FIG. 20, the head 83 (and hence the fork shaft 73) moves from the neutral position along the shift direction (right direction in the figure). To move to the shift completion position. As a result, the manual transmission enters the fifth speed shift state. In this state, as shown in FIG. 21, the position of the guide pin with respect to the shift guide plate 50 is the position of point e in FIG.

  Next, a case where the shift lever is in the reverse select position will be described. In this case, one head 84 is selected by the inner lever 21B. When the shift lever is operated from the reverse select position to the reverse shift position, as shown in FIG. 22, the head 84 (and therefore the fork shaft 74) shifts from the neutral position along the shift direction (left direction in the figure). Move up. As a result, the manual transmission is in the reverse shift state. In this state, as shown in FIG. 23, the position of the guide pin with respect to the shift guide plate 50 is the position of point g in FIG.

  Hereinafter, functions of the interlock plates 30A and 30B will be described. As shown in FIGS. 7, 10, 12, 14, 16, 18, 20, and 22, the recesses of the remaining unselected heads are either one of the interlock plates 30 </ b> A and 30 </ b> B. 33A or 33B). Here, the interlock plates 30A and 30B do not move in the shift direction. Therefore, even if an external force in the shift direction is applied to the unselected head for some reason, movement of the unselected head in the shift direction is restricted (prohibited). As described above, the interlock plates 30A and 30B (the restricting portions 33A and 33B) achieve a function (that is, an interlock function) for fixing an unselected head at the neutral position.

  As described above, when the shift lever is normally operated along the pattern shown in FIG. 4, one head is selected, and the remaining head is one of the interlock plates 30A and 30B (any one of the restricting portions 33A and 33B). It is fixed at the neutral position by the interlock function. On the other hand, in reality, the shift lever may be abnormally operated in a pattern shifted from the pattern shown in FIG. In such a case, two heads can be selected simultaneously. Hereinafter, this state is referred to as a “double selection state”.

  Even in the double selection state, at least one of the two selected heads is engaged with the interlock plate. As a result, movement of the inner lever and the selected two heads in the shift direction is restricted. Thus, according to the interlock function of the interlock plates 30A and 30B (regulators 33A and 33B), the phenomenon that the two heads move simultaneously to the shift completion position due to the double selection state (so-called “double”). The occurrence of “shift”) can also be suppressed.

  Next, the function of the shift guide plate 50 will be described. As shown in FIG. 8 and FIGS. 11, 13, 15, 17, 19, 21, and 23, when the shift lever is in the shift position of each gear stage (shift completion state of each gear stage), the guide pin The position with respect to the shift guide plate 50 is any one of the points a, b, c, d, e, f, and g in FIG. That is, the side surface of the corresponding protrusion 51 among the plurality of protrusions 51 engages with the guide pin at a position adjacent to one or both of the selection directions with respect to the guide pin. This engagement restricts the movement of the S & S shaft 20 in the select direction. In other words, the function of restricting the movement of the shift lever by the select operation (the select operation restricting function described above) is achieved in the shift completion state of each gear position. As a result, the operation feeling of the shift lever is improved.

(Action / Effect)
Hereinafter, the operation and effect of the S & S shaft assembly A according to the embodiment of the present invention will be described. According to the above embodiment, as shown in FIG. 5, the groove 53 of the shift guide plate 50 is fitted to the protrusion 23 of the S & S shaft 20 (specifically, the sleeve 22 fitted and fixed to the shaft body). The mounting and fixing of the shift guide plate 50 to the S & S shaft 20 (sleeve 22) is completed only by passing the knock pin 60 through the first and second knock holes 52 and 24.

  In addition, both the protrusion 23 and the groove 53 are wider toward the outer side in the radial direction. Therefore, the fitting of the protrusion 23 and the groove 53 can prevent the shift guide plate 50 from being detached from the S & S shaft 20 (sleeve 22) without using a member for preventing the drop such as a bolt. Therefore, the shift guide plate 50 can be fixed to the S & S shaft 20 (sleeve 22) simply and easily.

  By the way, in order to surely achieve the “select operation restricting function” described above, the mounting and fixing of the shift guide plate 50 (a plurality of protrusions 51 thereof) with respect to the S & S shaft 20 are performed in the select direction and the shift direction (particularly the select direction). ) High positional accuracy is required. In this regard, as shown in FIG. 24, in the select direction, high positional accuracy can be ensured by passing the knock pin 60 through the first and second knock holes 52 and 24. With respect to the shift direction, as shown in FIG. 25, a high positional accuracy is obtained by the contact of the side surface of the projection 23 of the S & S shaft 20 (sleeve 22) with the side surface of the groove 53 of the shift guide plate 50.

  On the other hand, in the radial direction, high positional accuracy cannot be obtained because the shift guide plate 50 cannot be reliably fixed to the S & S shaft 20 (sleeve 22). However, high position accuracy in the radial direction is not required to achieve the “select operation restriction function”. Therefore, the problem that the “select operation restriction function” is not achieved does not occur.

  As described above, according to the embodiment, the shift guide plate 50 can be fixed to the S & S shaft 20 (sleeve 22) easily and easily while ensuring high positional accuracy in the select direction and the shift direction (particularly the select direction). .

  The present invention is not limited to the above embodiment, and various modifications can be employed within the scope of the present invention. For example, in the above embodiment, two inner levers are formed in the S & S shaft 20, but only one or three or more inner levers may be formed in the S & S shaft 20.

  Further, in the above embodiment, there are four heads as objects to be engaged with the inner levers 21A, 21B or the interlock plates 30A, 30B (regulators 33A, 33B), but two, three, or five are present. There may be more than one head. Further, the arrangement order and positional relationship of the four heads in the select direction may be different.

  Moreover, in the said embodiment, although the plate 40 is used as one common rotation stop member of interlock plate 30A, 30B, it replaces with a plate and a pin is employ | adopted as one common rotation stop member. Good. In this case, a through hole parallel to the axial direction is formed in the engaging portion 32A (32B), and a pin is fitted into each through hole.

  In addition, in the above embodiment, the shift guide plate 50 is attached to the sleeve 22, and the shift guide plate 50 is fixed to the S & S shaft 20 by assembling the sleeve 22 to the shaft body. It may be directly attached and fixed to the shaft body. In this case, the second knock hole and the protrusion are directly formed on the shaft body.

  DESCRIPTION OF SYMBOLS 10 ... Fixed member, 20 ... S & S shaft, 21A, 21B ... Inner lever, 22 ... Sleeve, 23 ... Protrusion, 24 ... Knock hole, 30A, 30B ... Interlock plate, 31A, 31B ... Support part, 32A, 32B ... Engagement Joint part, 33A, 33B ... Restriction part, 34A, 34B ... Slit, 40 ... Plate, 50 ... Shift guide plate, 51 ... Multiple protrusions, 52 ... Knock hole, 53 ... Groove, 60 ... Knock pin, 71-74 ... Fork shaft, 81-84 ... shift head

Claims (2)

A fixing member fixed to the case of the transmission;
A shift-and-select shaft arranged to move in the axial direction with respect to the fixed member in response to a select operation and to rotate around the axis with respect to the fixed member in response to a shift operation. A shift and select shaft with a fixed inner lever protruding into the
A shift guide plate fixed to a side surface of the shift-and-select shaft, wherein a plurality of projections projecting radially outward from an outer surface are formed, and the side surfaces of the plurality of projections are the case A shift guide plate engaged with a guide pin fixed to a member fixed inside;
A shift and select shaft assembly of a transmission with
One shift head that engages with the inner lever is selected from among a plurality of shift heads arranged in parallel along the axial direction according to the selection operation, and the inner lever is The shift head is moved along the shift direction by pushing one selected shift head in a shift direction perpendicular to the axial direction, and a corresponding gear stage is achieved.
The plurality of protrusions correspond to positions adjacent to the guide pins in the axial direction when the shift-and-select shaft is in a position corresponding to a state where each shift stage of the transmission is achieved. The side surface of the projecting portion is arranged on the shift guide plate so as to be able to engage with the guide pin, and achieves the function of regulating the movement of the shift and select shaft in the axial direction.
The shift guide plate is formed with a first knock hole penetrating in the radial direction. The shift guide plate is recessed toward the outer side in the radial direction on the inner side surface of the shift guide plate and extends in the axial direction with a wider width toward the outer side in the radial direction. Grooves are formed,
The side surface of the shift and select shaft is formed with a second knock hole along the radial direction and a projection extending in the radial direction and projecting in the radial direction and wider in the axial direction.
A shift and select shaft assembly of a transmission in which the shift guide plate is fixed to a side surface of the shift and select shaft by fitting the groove into the protrusion and passing a knock pin through the first and second knock holes. . In the shift and select shaft assembly of the transmission according to claim 1,
The shift and select shaft includes a shaft main body and a sleeve fitted and fixed to a side surface of the shaft main body, and the inner lever, the second knock hole, and the protrusion are formed on the sleeve. In addition, transmission shift and select shaft assembly.

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